Welcome to Rails 4.
The new bundler groups.

Remove assets, add default and Rails.env.
Use exception_notification for rails 4.
Always use bundler.
Readd page caching for rails4.
Bandaid for Rails 4 routing "no all-catch" match rule.
Readd protected_attributes for rails4.
Fix validation regexp.
The json_escape monkeypatch is more a patch rather than fix.

--HG--
rename : lib/core_ext/fix-useful_json_escape.rb => lib/core_ext/patch-useful_json_escape.rb
Hope the best for utf8 and http header handling in rails4.
New (rails 3?) way of setting table name for a model.
Merge with mainline.
Merge with mainline.
Update gems.
Wtf is comma doing there.